Method and device for sidelink wireless communication

Abstract

The present disclosure provides method and device for wireless communications in sidelink. A first node receives a first signaling and a first radio signal, the first signaling indicating a first priority; determines whether to transmit a second signaling jointly according to a current value of a first counter and the first priority; when determining to transmit the second signaling, transmits the second signaling and updates the first counter's value with an initial value; when determining not to transmit the second signaling, drops transmitting the second signaling and updates the first counter's value by 1; herein, the first signaling comprises configuration information of the first radio signal. The present disclosure addresses the RLF triggered by the data-transmitting device due to the influence of the Half Duplex and/or transmitting capability of the V2X UE, thus enhancing the link robustness.

What is claimed is: 
     
       1. A first node for wireless communications, comprising:
 a first receiver, which receives a first signaling and a first radio signal, the first signaling indicating a first priority; 
 a first transmitter, which determines whether to transmit a second signaling according to a current value of a first counter and the first priority; when determining to transmit the second signaling, the first transmitter transmits the second signaling, and updates a value of the first counter with an initial value as a response of transmitting the second signaling; when determining not to transmit the second signaling, the first transmitter drops transmission of the second signaling, and updates the value of the first counter by 1 as a response of dropping transmission of the second signaling; 
 wherein determining whether to transmit a second signaling according to a current value of a first counter and the first priority includes: 
 when the current value of the first counter reaches a first threshold, whatever the first priority is, the second signaling is determined to be transmitted; or 
 when the current value of the first counter is equal to or less than a second threshold, whether to transmit the second signaling is determined according to the first priority; 
 the second threshold is less than the first threshold; the first signaling comprises configuration information of the first radio signal, and the second signaling is used for indicating whether the first radio signal is correctly decoded; the first signaling is a control signal; the first radio signal is a data signal; the first counter is maintained by the first node, and the first node is a User Equipment. 
 
     
     
       2. The first node according to  claim 1 , wherein steps taken by the first receiver and the first transmitter are implemented in an iterative process, including receiving the first signaling and the first radio signal, the first signaling indicating the first priority; determining whether to transmit the second signaling according to the current value of the first counter and the first priority; when determining to transmit the second signaling, transmitting the second signaling and updating the value of the first counter with the initial value; when determining not to transmit the second signaling, dropping transmission of the second signaling and updating the value of the first counter by 1; the value of the first counter, after being updated, is seen as the current value of the first counter in a next iteration. 
     
     
       3. The first node according to  claim 1 , comprising:
 the first transmitter, which determines a second priority according to the current value of the first counter and the first priority; 
 wherein when the first counter is running, the second priority is no lower than the first priority. 
 
     
     
       4. The first node according to  claim 3 , comprising the following when the first counter is running: the first node is in a state of receiving a radio signal transmitted by a transmitter of the first signaling and in which a HARQ feedback for the radio signal is enabled. 
     
     
       5. The first node according to  claim 1 , comprising:
 the first transmitter, which transmits a second radio signal to a second node; and which updates the value of the first counter with the initial value upon transmission of the second radio signal. 
 
     
     
       6. The first node according to  claim 1 , wherein the greater the value of the first counter is, the higher the second priority will be. 
     
     
       7. The first node according to  claim 1 , wherein comparing the second priority and a third priority, when the second priority is higher than the third priority, the second signaling is transmitted; when the second priority is lower than the third priority, the transmission of the second signaling is dropped;
 wherein the third priority indicates a priority of a third radio signal. 
 
     
     
       8. The first node according to  claim 7 , wherein the action of dropping transmission of the second signaling includes: transmitting the third radio signal; or receiving the third radio signal;
 wherein a time-domain resource occupied by the third radio signal has at least one overlapping multicarrier symbol with a time-domain resource occupied by the second signaling. 
 
     
     
       9. A method in a first node for wireless communications, comprising:
 receiving a first signaling and a first radio signal, the first signaling indicating a first priority; 
 determining whether to transmit a second signaling according to a current value of a first counter and the first priority; when determining to transmit the second signaling, transmitting the second signaling, and updates a value of the first counter with an initial value as a response of transmitting the second signaling; when determining not to transmit the second signaling, dropping transmission of the second signaling, and updates the value of the first counter by 1 as a response of dropping transmission of the second signaling; 
 wherein determining whether to transmit a second signaling according to a current value of a first counter and the first priority includes: 
 when the current value of the first counter reaches a first threshold, whatever the first priority is, the second signaling is determined to be transmitted; or 
 when the current value of the first counter is equal to or less than a second threshold, whether to transmit the second signaling is determined according to the first priority; 
 the second threshold is less than the first threshold; the first signaling comprises configuration information of the first radio signal, and the second signaling is used for indicating whether the first radio signal is correctly decoded; the first signaling is a control signal; the first radio signal is a data signal; the first counter is maintained by the first node, and the first node is a User Equipment. 
 
     
     
       10. The method in the first node according to  claim 9 , wherein steps are taken to receive the first signaling and the first radio signal, the first signaling indicating the first priority; whether to transmit the second signaling is determined according to the current value of the first counter and the first priority; when determining to transmit the second signaling, the second signaling is transmitted and the value of the first counter is updated with the initial value; when determining not to transmit the second signaling, transmission of the second signaling is dropped and the value of the first counter is updated by 1; the value of the first counter, after being updated, is seen as the current value of the first counter in a next iteration. 
     
     
       11. The method in the first node according to  claim 9 , comprising:
 determining a second priority according to the current value of the first counter and the first priority; 
 wherein when the first counter is running, the second priority is no lower than the first priority. 
 
     
     
       12. The method in the first node according to  claim 11 , comprising the following when the first counter is running: the first node is in a state of receiving a radio signal transmitted by a transmitter of the first signaling and in which a HARQ feedback for the radio signal is enabled. 
     
     
       13. The method in the first node according to  claim 11 , wherein the greater the value of the first counter is, the higher the second priority will be. 
     
     
       14. The method in the first node according to  claim 11 , wherein comparing the second priority and a third priority, when the second priority is higher than the third priority, the second signaling is transmitted; when the second priority is lower than the third priority, the transmission of the second signaling is dropped;
 wherein the third priority indicates a priority of a third radio signal. 
 
     
     
       15. The method in the first node according to  claim 14 , wherein the action of dropping transmission of the second signaling includes: transmitting the third radio signal; or receiving the third radio signal;
 wherein a time-domain resource occupied by the third radio signal has at least one overlapping multicarrier symbol with a time-domain resource occupied by the second signaling. 
 
     
     
       16. The method in the first node according to  claim 9 , comprising:
 transmitting a second radio signal to a second node; and 
 updating the value of the first counter with the initial value upon transmission of the second radio signal.